diff --git a/.devcontainer/devcontainer-lock.json b/.devcontainer/devcontainer-lock.json
index 089089c..4fa18ce 100644
--- a/.devcontainer/devcontainer-lock.json
+++ b/.devcontainer/devcontainer-lock.json
@@ -1,9 +1,9 @@
 {
   "features": {
-    "ghcr.io/devcontainers/features/docker-in-docker:4.1.0": {
-      "version": "4.1.0",
-      "resolved": "ghcr.io/devcontainers/features/docker-in-docker@sha256:7d979c4a36d595eb4ab79909caa3f396daf3b6152dcf38e8328ea4eff42206c7",
-      "integrity": "sha256:7d979c4a36d595eb4ab79909caa3f396daf3b6152dcf38e8328ea4eff42206c7"
+    "ghcr.io/devcontainers/features/docker-in-docker:4.1.3": {
+      "version": "4.1.3",
+      "resolved": "ghcr.io/devcontainers/features/docker-in-docker@sha256:fae40f3c8be5a7c3b0db344c1d30341bc2c91ba38d1d5b14cd2ad72e6d65d084",
+      "integrity": "sha256:fae40f3c8be5a7c3b0db344c1d30341bc2c91ba38d1d5b14cd2ad72e6d65d084"
     },
     "ghcr.io/devcontainers/features/node:2.1.0": {
       "version": "2.1.0",
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index d6021ca..fbfed46 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -2,7 +2,7 @@
 	"name": "Python 3.13",
 	"image": "mcr.microsoft.com/devcontainers/python:3-3.13-bookworm",
 	"features": {
-		"ghcr.io/devcontainers/features/docker-in-docker:4.1.0": {},
+		"ghcr.io/devcontainers/features/docker-in-docker:4.1.3": {},
 		"ghcr.io/devcontainers/features/node:2.1.0": {}
 	},
 	"postCreateCommand": "/bin/sh .devcontainer/postCreateCommand.sh",
diff --git a/CHANGELOG.md b/CHANGELOG.md
index dcc7ca1..854ff99 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.15.0]
+
 ### Added
 
 - Immutable `StepDefinition` declarations and synchronous/asynchronous embedded step execution use explicit host namespaces and keep validated writeback inside the ordinary lifecycle boundary.
diff --git a/pyproject.toml b/pyproject.toml
index 6d83a50..ebb5c37 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "nighthawk-python"
-version = "0.14.0"
+version = "0.15.0"
 description = "A Python library where Python controls flow and LLMs or coding agents reason within constrained Natural blocks."
 readme = "README.md"
 requires-python = ">=3.13"
diff --git a/uv.lock b/uv.lock
index e85eee8..cb38777 100644
--- a/uv.lock
+++ b/uv.lock
@@ -931,7 +931,7 @@ wheels = [
 
 [[package]]
 name = "nighthawk-python"
-version = "0.14.0"
+version = "0.15.0"
 source = { editable = "." }
 dependencies = [
     { name = "headson" },